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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2012-04-18 19:04:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-05-09 13:28:59 +0200 |
| commit | 0acbb440f06302058e1515861dd534594521e892 (patch) | |
| tree | 253d5cd412bc8b07ea9c83052ac3b7ece8b944f6 /arch | |
| parent | x86/numa: Allow specifying node_distance() for numa=fake (diff) | |
| download | linux-0acbb440f06302058e1515861dd534594521e892.tar.xz linux-0acbb440f06302058e1515861dd534594521e892.zip | |
x86/numa: Hard partition cpu topology masks on node boundaries
When using numa=fake= you can get weird topologies where LLCs can span
nodes and other such nonsense. Cure this by hard partitioning these
masks on node boundaries.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/n/tip-di5vwjm96q5vrb76opwuflwx@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 6e1e406038c2..edfd03a9e390 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -337,6 +337,11 @@ void __cpuinit set_cpu_sibling_map(int cpu) for_each_cpu(i, cpu_sibling_setup_mask) { struct cpuinfo_x86 *o = &cpu_data(i); +#ifdef CONFIG_NUMA_EMU + if (cpu_to_node(cpu) != cpu_to_node(i)) + continue; +#endif + if (cpu_has(c, X86_FEATURE_TOPOEXT)) { if (c->phys_proc_id == o->phys_proc_id && per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i) && @@ -360,11 +365,17 @@ void __cpuinit set_cpu_sibling_map(int cpu) } for_each_cpu(i, cpu_sibling_setup_mask) { +#ifdef CONFIG_NUMA_EMU + if (cpu_to_node(cpu) != cpu_to_node(i)) + continue; +#endif + if (per_cpu(cpu_llc_id, cpu) != BAD_APICID && per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) { cpumask_set_cpu(i, cpu_llc_shared_mask(cpu)); cpumask_set_cpu(cpu, cpu_llc_shared_mask(i)); } + if (c->phys_proc_id == cpu_data(i).phys_proc_id) { cpumask_set_cpu(i, cpu_core_mask(cpu)); cpumask_set_cpu(cpu, cpu_core_mask(i)); |